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During 12-day post-mortem ageing of psoas major and minor (PM) and semitendinosus (ST) muscles of calves, heifers and cows at 4°C, changes in pH and thermal soluble intramuscular collagen were determined at 3-day intervals. Additionally, on the 1st and 12th day of cold storage, the muscle samples were roasted at 170°C to internal temperature of 78°C and stored for next 12 days at 4°C, then soluble...
Survivability of free and microencapsulated Lactobacillus rhamnosus bacteria in different pH media was investigated. Microencapsulated bacteria were also subjected to freeze-drying. Encapsulation and freeze-drying are effective stabilisation methods increasing their resistance to environmental pH.
The aim of the study was to evaluate the kind and importance of factors influencing the choice of vegetables and fruit consumed by the youth. The research was carried out on youth group aged 15-16. The group consisted of 966 pupils, including 483 girls and 483 boys, living in Szczecin. They were selected for the research in two steps, in groups. Fourteen choice factors of raw vegetables and fruit,...
In this study, a comparative analysis of olfactory efficiency and preferences for selected categories of food products was conducted in the good- -sighted elderly (GSE) and in the blind elderly (BE) and relationships between those parameters were determined. The measurements of olfactory sensitivity were conducted by air-blast olfactorimetric method, while food preferences were assessed by a questionnaire...
The aim of the study was to determinate the changes in sensory characteristics of sweet cherry cv. Kordia during cold storage. Evaluations of fruits were carried out in three consecutive years: 1999, 2000 and 2001. After harvest fruits were divided into two classes according to their colour intensity (lighter, darker) and stored in the air at temperature of: -0.5°C, +2°C, and +9°C. Immediately after...
The aim of this study was to asses the impact of professional education in a ballet school on total energy expenditure, energy balance and nutritional status of pupils. In 44 girls (x age = 13±1) from a professional elite Dance School (BSD) and 29 girls (x age = 13±1) selected from a local primary school, constituting the control group (CG), daily energy expenditure (TEE) - by 24-h heart rate monitoring...
Two strains of yeast Candida sphaerica WKIIW3b and Kluyveromyces fragilis 28 and hypha fungi Penicillium canescens were grown on culture media where the source of carbon was permeate after ultrafiltration of milk, soybean flour or wheat bran applied individually or in various combinations. In the obtained preparations of ß-galactosidase the activity of hydrolysis with ONPG and lactose was determined...
The present research dealt with comparing the effect of zinc-vitamin A-micronutrient mixture (ZAMM) administration on the nutritional status of infants with acute and persistent diarrhea. In addition, its effect on the management of both types of diarrhea was studied. Zinc and vitamin A were given as 8 mg and 751 µg retinol equivalent respectively per day. The results showed that administration of...
The efficacy of confirmatory tests recommended by a PrPN EN ISO 11290-1:1999 standard for identification of Listeria spp. and L. monocytogenes strains in food products was examined in our studies. Confirmatory assays consisted of catalase and motility (a characteristic 'umbrella- -shape' outgrowth) tests for Listeria spp. as well as hemolytic activity and sugar fermentation (D-xylose and L-rhamnose)...
Yield and chemical composition of two linseed cultivars of various colour was checked in the years 1998-2000. Dry matter, organic matter, total protein, ether extract, crude fibre, N-free extractives, acid detergent fiber (ADF), neutral detergent fiber (NDF), gross energy, sum of saturated and unsaturated acids were taken into account. Brown linseed - Opal and yellow - Hungarian Gold did not reveal...
Conjugated linoleic acid (CLA) as a derivative of linoleic acid (LA) is a generic term used to refer to a mixture of geometrical and positional isomers in which up to 16 members have been identified. CLA is unique because unlike most antioxidants which are components of plant products, it is found in foods of animal origin, such as dairy products and meats. CLA concentrations in dairy foods range...
Electrosynthesis as well as coacervation at pH 3.2 were employed for preparation of complexes of xanthan gum with ovalbumin. Complexes contained by —10% of ovalbumin more than blends from which the complexes were prepared. Preparation method had a minor effect on the properties of the prepared complexes. Complexes from coacervation were slightly more thermally stable than complexes prepared electrosyn-...
The performed experiments allowed investigating a strain of Candida bombicola ATCC 22214 yeasts from the point of view of its potential to manufacture extracellular lipase and its activity in relation to the applied fat substrate. Oleic acid, sunflower oil and a post-deodorizing condensate were used as culturing substrates. It was found that the best agent stimulating yeast enzymatic system to produce...
The investigation included evaluation of milk obtained from 97 hf cows imported from France and 119 bw cows of local population with different share of hf breed. Milk from cows of the two populations was characterized by the proper freshness (pH value, potential acidity) meeting the criteria for purchase (PN-A-86002:1999), and a high hygienic quality (TNM, SCC) allowed them to be qualified to the...
Rhizopus cohnii lipase was immobilized by adsorption on porous chitosan polyphosphate beads. The obtained preparation, active against fatty acids esters of p-nitrophenol and against olive oil, was characterised and compared with the free enzyme. Both lipase forms displayed the highest activity at pH 8-9. The optimum activity temperature of free and immobilized lipase was 37°C and 30°C, respectively...
Healthy diet is one of the most important factors determining somatic and mental development of children. The reported study aimed at assessing food intake and nutritional status of 600 children aged 11-14, pupils of primary schools in the city of Poznań. The 24-h recall was taken to evaluate the total intake of basic nutrients, i.e. proteins, fats and carbohydrates. The nutritional status of children...
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